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Finding the Fourth Proportional to 553,750.61, 764,191.72 and 312,019.88

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Solution

The fourth proportional to 553,750.61, 764,191.72 and 312,019.88 is: 430,596.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,750.61 : 764,191.72 = 312,019.88 : x
  2. Step 2: Convert to fraction form
    553,750.61/764,191.72 = 312,019.88/x
  3. Step 3: Cross multiply
    553,750.61x = 764,191.72 × 312,019.88
  4. Step 4: Simplify right side
    553,750.61x = 238,443,008,771.39
  5. Step 5: Solve for x
    x = 238,443,008,771.39/553,750.61
  6. Step 6: Final answer
    x = 430,596.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.